they would die.
Humans need oxygen to survive and think.If you dont have enoff oxygen for your brain it will stop working and you will eventually die.Humans also need oxygen sso that they can breath out carbon dioxide.If we didnt have oxygen we wouldnt have carbon dioxide.Carbon Dioxide is the thing that plants breath in.So if we didnt have oxygen plants would die.And then the animals that eat plants will die.Then the animals that eaet does animals will die.And we are omnivore(means we eat plants and animals)so if there were no plants and animals we will die of hunger That is why we need oxygen Patronum483 :)
We can't do it at all humans can not make oxygen!!!!!!!!!!
Oxygen is the gas humans and animals need to breathe in.
No i believe they do not cause humans get oxygen from trees animals really are not different from humans so animals get the oxygen from trees just like humans
YES as humans we need oxygen to breath
Humans inhale oxygen and exhale carbon dioxide.
Yes humans inhale oxygen but exhale carbon dioxide.
Oxygen
Oxygen is essential to humans. We breathe it in.
They breathe in oxygen like humans.
Birds get oxygen from the atmosphere, the same as humans do.
Humans need to bring food, water, oxygen,